{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Fucoidan , a sulfated polysaccharide in the cell wall matrix of brown algae , has attracted much attention for its multiple biological activities , and we further explored the effects and possible underlying mechanisms of fucoidan on MM cell escape from cytarabine cytotoxicity ."}
{"Chemical": ["cytarabine"]}